<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>
	<body>
		<script>
			//提示框
			window.prompt("请输入用户名：","admin");
			prompt("请输入密码：");
			//警告框
			alert("请注意！");
			//确认框
			confirm("确认要修改？");
			
		</script>
	</body>
</html>
